CAJ | 학술논문

针对北京大兴某地区粉土采用了短切玄武岩纤维作为添加剂进行了改良,采取纤维长度、纤维掺入比以及压实度作为变量对纤维土进行了固结快剪试验、压缩试验、变水头渗透试验,结果表明:经过改良后的粉土在抗剪强度、压缩性能以及渗透性能等方面均得到了提高;在相同纤维长度情况下,各方面性能增强在4‰纤维掺量内呈衰减式增长,对强度和压缩性的改良以3‰为最佳,对于渗透性能以2‰最佳;在相同掺量的情况下,对于抗剪强度和压缩性能3 cm纤维最佳,对于渗透性能2 cm纤维最佳;在最优掺入方案下纤维土的压实度与压缩系数、渗透系数存在二次幂函数关系,压缩系数与3 cm纤维掺入量也存在四次幂函数关系.
침대북경대흥모지구분토채용료단절현무암섬유작위첨가제진행료개량,채취섬유장도、섬유참입비이급압실도작위변량대섬유토진행료고결쾌전시험、압축시험、변수두삼투시험,결과표명:경과개량후적분토재항전강도、압축성능이급삼투성능등방면균득도료제고;재상동섬유장도정황하,각방면성능증강재4‰섬유참량내정쇠감식증장,대강도화압축성적개량이3‰위최가,대우삼투성능이2‰최가;재상동참량적정황하,대우항전강도화압축성능3 cm섬유최가,대우삼투성능2 cm섬유최가;재최우참입방안하섬유토적압실도여압축계수、삼투계수존재이차멱함수관계,압축계수여3 cm섬유참입량야존재사차멱함수관계.
Basalt fiber was used to reinforce the silt of a construction in Daxing, Beijing. Based on the experimental variable of fiber length, mixing ratio, compactness , a series of tests which consist of consolidated shear test, compression test, and variable head permeability test were developed. The test results showed that the properties of the silt in shear strength, compressibility and permeability were improved. When fiber length was set as constant, the improvement in each respects of the basalt fiber-reinforced silt was increased;when the mixing ratio was less than 4‰the property was increasing in the form of attenuation;3‰was the best mixing ratio for shear strength and compressibility, and 2‰was the best for permeability;for fiber length ,when the mixing ratio was constant, 3 cm was the best length for the shear strength and compressibility, and 2 cm had the best effect for permeability. Under the best mixing scheme ,compactness of basalt fiber-reinforced silt obeyed a quadratic function relationship with compressibility and permeability coefficient, and there was also a quartic function relationship between compressibility coefficient and 3 cm fiber' s mixing ratio.